RS-485 Port Protection Evaluation Board 2
Performance Graphs
Run
T
T
Trig?
PreVu
T
T
Trig?
Ch1 Max
545 V
1
4
Ch1 Min
-390 V
Ch4 Max
11.3 mA
Ch4 Min
-2.55 A
Ch1
500 V
Ch4
5.00 A Ω
M 10.0 ns
T
20.40 %
Ch1 Max
329 V
1
4
Ch1 Min
-20.5 V
Ch4 Max
1.98 A
Ch4 Min
-81.1 mA
Ch1
200 V
Ch4
1.00 A Ω
M 400 ns
T
31.60 %
A
Ch1
-380 V
A
Ch1
116 V
Ch 1: input voltage / surge / fault to TBU® HSP
Ch 4: TBU® HSP current
The ohm unit following the current units
shown for Channel 4 (i.e. AOhm)
indicates that a 50 ohm termination was
used internal to the oscilloscope
Ch 1: input voltage / surge / fault to TBU® HSP
Ch 4: TBU® HSP current
The ohm unit following the current units
shown for Channel 4 (i.e. AOhm)
indicates that a 50 ohm termination was
used internal to the oscilloscope
Figure 3
ESD +8 KV Contact Discharge (IEC-61000-4-2)
Figure 4
Surge 1.2/50 5 KV
Run
T
T
Trig’d
Run
T
T
Trig’d
Ch1 Max
124.4 V
1
4
Ch4 Max
365.4 mA
Ch4 Min
-322.4 mA
1
4
Ch1 Max
28.3 V
Ch4 Max
451.8 mA
Ch4 Min
-395.7 mA
Ch1
100 V
Ch4
200 mA Ω
M 4.00 ms
T
20.20 %
A Line
116 V
Ch1
20.0 V
Ch4
200 mA Ω
M 4.00 ms
T
20.20 %
A Line
116 V
Ch 1: input voltage / surge / fault to TBU® HSP
Ch 4: TBU® HSP current
The ohm unit following the current units
shown for Channel 4 (i.e. AOhm)
indicates that a 50 ohm termination was
used internal to the oscilloscope
Ch 1: input voltage / surge / fault to TBU® HSP
Ch 4: TBU® HSP current
The ohm unit following the current units
shown for Channel 4 (i.e. AOhm)
indicates that a 50 ohm termination was
used internal to the oscilloscope
Figure 5
120 V
rms
Figure 6
28 V
rms
Reference
For more information on implementing advanced circuit protection technologies for RS-485 ports, please review the Bourns RS-485
application note:
http://www.bourns.com/data/global/pdfs/Bourns_RS-485_AppNote.pdf
For further technical support and for complete
circuit protection solutions, please visit
www.bourns.com
11/11 • FU1107
“TBU” is a registered trademark of Bourns, Inc. in the U.S., Taiwan and European Community.
“Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries.
COPYRIGHT© 2011 • BOURNS, INC. • 11/11 • e/FU1107
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